Description of Business and Summary of Significant Accounting Policies Sales Incentive Table (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Sales Incentives [Abstract]
Accrued sales incentives	$ 17,401	$ 16,821	$ 18,154	$ 11,981
Sales Incentive Liabilities Acquired During Acquisitions	0	0	7,149
Accruals of Sales Incentives	37,114	35,636	43,671
Payments and Credits of Sales Incentives	(34,544)	33,619	(40,985)
Reversals for Unearned Sales Incentives	(1,935)	(2,933)	(2,200)
Reversals for Unclaimed Sales Incentives	(55)	(417)	(1,462)
Reversals for Unclaimed or Unearned Sales Incentives	$ 1,990	$ 3,350	$ 3,662